Flush wall mount thermostat and in-set mounting plate for a heating, ventilation and air conditioning system

ABSTRACT

One aspect provides of this disclosure provides a flush wall mounting system for an electronic controller. This embodiment comprises a housing for receiving electrical components therein and having a front panel and a back panel coupled to the front panel. The back panel has a raised portion extending therefrom. This aspect further includes a mounting plate removably couplable to the back panel of the housing and has front and back sides. The front side includes a flange around a perimeter thereof and has a recess formed therein configured to receive the raised portion of the back panel therein. The recess forms a raised portion extending from the back side and configured to be receivable within an opening in a wall. A method for manufacturing the mounting system is also provided.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application Ser. No. 61/167,135, filed by Grohman, et al., on Apr. 6, 2009, entitled “Comprehensive HVAC Control System”, and is a continuation-in-part application of application Ser. No. 12/258,659, filed by Grohman on Oct. 27, 2008, entitled “Apparatus and Method for Controlling an Environmental Conditioning Unit,” both of which are commonly assigned with this application and incorporated herein by reference. This application is also related to the following U.S. patent applications, which are filed on even date herewith, commonly assigned with this application and incorporated herein by reference:

Serial No. Inventors Title 12/603,464 Grohman, “Alarm and Diagnostics System and Method et al. for a Distributed-Architecture Heating, Ventilation and Air Conditioning Network” U.S. Pat. Thorson, “System and Method of Use for a User No. et al. Interface Dashboard of a Heating, 8,615,326 Ventilation and Air Conditioning Network” 12/603,382 Grohman “Device Abstraction System and Method for a Distributed-Architecture Heating, Ventilation and Air Conditioning Network” U.S. Pat. Grohman, “Communication Protocol System and No. et al. Method for a Distributed-Architecture 8,352,080 Heating, Ventilation and Air Conditioning Network” U.S. Pat. Hadzidedic “Memory Recovery Scheme and Data No. Structure in a Heating, Ventilation and 8,295,981 Air Conditioning Network” U.S. Pat. Grohman “System Recovery in a Heating, No. et al. Ventilation and Air Conditioning 8,255,086 Network” 12/603,473 Grohman, “System and Method for Zoning a et al. Distributed-Architecture Heating, Ventilation and Air Conditioning Network” U.S. Pat. Grohman, “Method of Controlling Equipment in a No. et al. Heating, Ventilation and Air 8,600,559 Conditioning Network” U.S. Pat. Grohman, “Programming and Configuration in a No. et al. Heating, Ventilation and Air 8,762,666 Conditioning Network” 12/603,431 Mirza, “General Control Techniques in a et al. Heating, Ventilation and Air Conditioning Network”

TECHNICAL FIELD

This application is directed, in general, to HVAC systems and, more specifically, to a flush wall amount thermostat and mounting plate for a distributed-architecture heating, ventilation and air conditioning (HVAC) system.

BACKGROUND

Climate control systems, also referred to as HVAC systems (the two terms will be used herein interchangeably), are employed to regulate the temperature of premises, such as a residence, office, store, warehouse, vehicle, trailer, or commercial or entertainment venue. The most basic climate control systems either move air (typically by means of an air handler or, or more colloquially, a fan or blower), heat air (typically by means of a furnace or heat pump) or cool air (typically by means of a compressor-driven refrigerant loop). A wall mounted thermostat is typically included in the climate control systems to provide some level of automatic temperature control. In its simplest form, a thermostat turns the climate control system on or off as a function of a detected temperature. In a more complex form, a thermostat may take other factors, such as humidity or time, into consideration. Still, however, the operation of a thermostat remains turning the climate control system on or off in an attempt to maintain the temperature of the premises as close as possible to a desired setpoint temperature.

Climate control systems as described above have been in wide use since the middle of the twentieth century and have, to date, generally provided adequate temperature management are typically controlled by an electronic controller, such as a thermostat that is mounted on the outside surface of the wall.

SUMMARY

One aspect of this disclosure provides a flush wall mounting system for an electronic controller. This embodiment comprises a housing for receiving electrical components therein and having a front panel and a back panel coupled to the front panel. The back panel has a raised portion extending from it. This embodiment further includes a mounting plate that is removably couplable to the back panel of the housing and has front and back sides. The front side includes a flange around a perimeter thereof and has a recess formed therein configured to receive the raised portion of the back panel therein. The recess forms a raised portion extending from the back side and configured to be receivable within an opening in a wall.

In another aspect, there is provided a method of fabricating a flush wall mounting system for an electronic controller. In this embodiment, the method comprises forming a front panel of a housing for receiving electrical components therein, forming a back panel of the housing wherein the back panel has a raised portion extending from it, and forming a mounting plate that is removably couplable to the back panel. The mounting plate has front and back sides, and the front side includes a flange around a perimeter thereof and has a recess formed therein configured to receive the raised portion of the back panel therein. The recess results in a raised portion extending from the back side and is configured to be receivable within an opening in a wall.

Another embodiment is directed to a flush wall mounting plate for an electronic control system. This embodiment comprises a mounting frame including a front side having a recess formed therein configured to receive an electronic control system housing therein and a back side having a raised portion configured to be inserted into an opening in a wall. The front side includes a flange located about the front side. Movable tabs are located on an inside edge or back side of the recess and are movably coupled to the frame. The movable tabs are configured to secure the wall mounting plate within the opening when in an engaged position.

BRIEF DESCRIPTION

Reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a high-level block diagram of an HVAC system within which a device abstraction system and method may be contained or carried out and in which the thermostat as provided herein may be employed;

FIG. 2 is a high-level block diagram of one embodiment of an HVAC data processing and communication network 200 in which the thermostat as provided herein my be employed;

FIG. 3 illustrates an exploded view of a electronic controller and mounting plate that can be used with the HVAC system;

FIG. 4A illustrates a back view of the housing of the electronic controller;

FIG. 4B illustrates a front view of a mounting plate for the housing of FIG. 4A;

FIG. 5A illustrates a front view of the housing coupled to the mounting plate;

FIG. 5B illustrates a back view of the housing coupled to the mounting plate;

FIG. 6 illustrates a back view of the housing showing a portion of the electronic components located within the housing;

FIG. 7 illustrates a back view of the housing coupled to the mounting plate;

FIGS. 8A-8C illustrate one embodiment of a securing system for the mounting plate;

FIGS. 9A-9C illustrate another embodiment of a securing system for the mounting plate;

FIGS. 10A-10C illustrate another embodiment of a securing system for the mounting plate;

FIGS. 11A-11C illustrate another embodiment of a securing system for the mounting plate;

FIGS. 12A-12C illustrate another embodiment of a securing system for the mounting plate;

DETAILED DESCRIPTION

As stated above, conventional climate control systems have been in wide use since the middle of the twentieth century and have, to date, generally provided adequate temperature management. However, it has been realized that more sophisticated control and data acquisition and processing techniques may be developed and employed to improve the installation, operation and maintenance of climate control systems.

Described herein are various embodiments of an improved climate control, or HVAC, system in which at least multiple components thereof communicate with one another via a data bus. The communication allows identity, capability, status and operational data to be shared among the components. In some embodiments, the communication also allows commands to be given. As a result, the climate control system may be more flexible in terms of the number of different premises in which it may be installed, may be easier for an installer to install and configure, may be easier for a user to operate, may provide superior temperature and/or humidity control, may be more energy efficient, may be easier to diagnose and perhaps able to repair itself, may require fewer, simpler repairs and may have a longer service life.

FIG. 1 is a high-level block diagram of an HVAC system, generally designated 100, which may include indoor air quality devices, such as for example, humidifiers, dehumidifiers, UV lights, filters, ventilators, and the like. In one embodiment, the system 100 is configured to provide ventilation and therefore includes one or more air handlers 110. In an alternative embodiment, the system 100 is configured to provide heating and therefore includes one or more furnaces 120, typically associated with the one or more air handlers 110. In an alternative embodiment, the system 100 is configured to provide cooling and therefore includes one or more refrigerant evaporator coils 130, typically associated with the one or more air handlers 110. Such embodiment of the system 100 also includes one or more condenser coils 140, which are typically associated with one or more compressors in one or more so-called “outdoor units.” In an alternative embodiment, the system 100 is configured to provide ventilation, heating and cooling, in which case the one or more air handlers, furnaces and evaporator coils are contained in common “indoor,” e.g., attic units (not shown).

One or more thermostats 150 control one or more of the one or more air handlers 110, the one or more furnaces 120 and/or the one or more compressors 140 to regulate the temperature of the premises, at least approximately. In various embodiments to be described, the one or more thermostats provide additional functions such as operational, diagnostic and status message display and an attractive, visual interface that allows an installer, user or repairman to perform actions with respect to the system 100 more intuitively.

Although the one or more thermostats 150 typically contain temperature sensors (not shown) themselves, one or more separate, remote (indoor or outdoor) temperature sensors 160 may provide additional temperature data. Although not shown, one or more humidity sensors may be included in the system 100. Also, although the one or more thermostats 150 typically contain a display, such as a liquid crystal display (not shown), one or more separate, remote displays 170 may be included in the system 100.

Although not shown in FIG. 1, the HVAC system 100 may include one or more heat pumps in lieu of or in addition to the one or more furnaces 120, one or more evaporator coils 130 and one or more condenser coils and compressors 140. One or more humidifiers or dehumidifiers may be employed to increase or decrease humidity. One or more dampers may be used to modulate air flow through ducts (not shown). Air cleaners and lights may be used to reduce air pollution. Air quality sensors may be used to determine overall air quality.

Finally, a data bus 180, which in the illustrated embodiment is a serial bus but may include other embodiments, such as a parallel bus or wireless application, couples the one or more air handlers 110, the one or more furnaces 120, the one or more evaporator coils 130, the one or more condenser coils and compressors 140, the one or more thermostats 150, the one or more remote sensors 160 and the one or more remote displays 170 together such that data may be communicated therebetween or thereamong. The remote sensor 160 may be for temperature, humidity, particulate count, C02 count, volatile organic compound count, occupancy, motion, etc. As will be understood, the data bus 180 may be advantageously employed to convey one or more alarm messages or one or more diagnostic messages.

FIG. 2 is a high-level block diagram of one embodiment of an HVAC data processing and communication network 200 that may be employed in the HVAC system 100 of FIG. 1. One or more air handler controllers (AHCs) 210 may be associated with the one or more air handlers 110 of FIG. 1. One or more integrated furnace controllers (IFCs) 220 may be associated with the one or more furnaces 120, one or more evaporator coils 130 and one or more condenser coils and compressors 140 of FIG. 1. Subnet controllers (SCs) 230 may be employed to divide the network 200 into subnetworks, simplifying network configuration, communication and control. If more than one SC 230 is used in a particular network 200, one of the SCs 230 is designated as an active SC (aSC) at a time, while each of the remaining ones of the SCs 230 are designated as an inactive SC (iSC). A user interface (UI) 240 provides a means by which a person may communicate with the remainder of the network 200. In an alternative embodiment, a user interface/gateway (UI/G) 250 provides a means by which a person or other equipment may communicate with the remainder of the network 200. The serial bus 180, which is hereinafter referred to as a residential serial bus, or RSBus, provides communication between or among the aforementioned elements of the network 200. It should be understood that the use of the term “residential” is nonlimiting; the network 200 may be employed in any premises whatsoever.

FIG. 3 illustrates an embodiment of an exploded view of an electronic controller 300 that can be used to control the above-described system or other similar electronic systems that might be found in a business or residence. In the illustrated embodiments set forth herein, the controller 300 is embodied as a thermostat for an HAVC system, however, it should be understood that the controller 300 could also be another type of controller, such as those for controlling entertainment systems, humidifying systems, or alarm or security systems. In the embodiment illustrated in FIG. 3, the controller 300 includes a housing 301 that includes a front panel 302 that has a controller interface 303 that allows a user to set various control parameters for the system being controlled and read output indicia. FIG. 3 illustrates a touch screen configuration, but it should be understood that the front panel 302 may also include physical buttons for setting various operating parameters for the controller 300. The housing 301 further includes a back panel 305 that may be removably coupled to the front panel 302. Typically screws, bolts, or cooperative molded snap latches can serve to hold the front panel 302 and back panel 305 together. The housing 301 contains electronic components (not shown) that are configured to interface with and control the subject system.

The controller 300 also includes a mounting plate 307 that is configured (as used in this application and claims this term means that it has a design, including electrical or physical aspects, or a geometric shape) to be removably coupled to the back panel 305 of the housing 301. Thus, it can be easily removed from the housing 301. As explained below in more detail, the mounting plate 307 has a unique configuration that, when attached to the back panel 305, allows the housing 301 to be positioned more flush with a wall 309 than previous designs. This configuration not only keeps the sensor, as close to the monitored space as possible, it also keeps the housing 301 from extending too far into the monitored space, which reduces the risk of a person inadvertently bumping into the housing 301 and injuring themselves or damaging the housing 301. In the illustrated embodiment of FIG. 3, the mounting plate 307 may be configured to be attached to an existing conventional electrical wiring box 310 contained within an opening 311 in the wall 309. However, as explained below, other embodiments allow the mounting plate 307 to be mounted to the wall 309 without the need of the electrical wiring box 310.

FIG. 4A illustrates a back view of the housing 301, which illustrates advantageous features of this embodiment, and FIG. 4B shows a front view of the mounting plate 307. As seen in FIG. 4A, back panel 305 is coupled to front panel 302 of the housing 301. Back panel 305 includes a raised portion 410. The raised portion 410 has an overall length and width dimensions that are less than those of the back panel 305. Thus, the dimensional footprint of the raised portion 410 is smaller than the dimensional footprint of the back panel 305. The raised portion 410 is configured to be received into a recess 411 of the mounting plate 307 (FIG. 4B). The recess 411 has a dimensional footprint that is just large enough to receive the raised portion 410 therein. The recess 411 also results in a raised portion 412 on the back side of the mounting plate 307 that has substantially the same dimensional footprint as the recess 411. The raised portion 412 is configured to extend into the opening 311 of the wall 309 or into the electrical wiring box 310 (see FIG. 3). Both the housing 301 and the mounting plate 307 may be made of any type of moldable material, such as stamped metal or molded, including both form molded or injected molded materials, such as plastic or other composite materials.

In the illustrated embodiment, the raised portion 410 of the back panel 305 also includes one or more latch openings 413 that are configured to receive a corresponding latch 414 that is located within the recess 411 of the mounting plate 307. The latch or latches 414 may be a resilient snap latch of a design know to those skilled in the art. However, as mentioned below, the latch 414 may be configured as a wiring block coupled to the mounting plate 307 or housing 301 that secures the housing 301 to the mounting plate 307 when connector pins extending from the housing 301 or mounting plate 307 are received within the wiring block. In other embodiments, the number and configuration of both the latch openings 414 and latches 415 may vary and have a different configuration than that shown.

An opening 415 located in the raised portion 410 of the back panel 305 is also present in the illustrated embodiment of FIG. 4A. Located within the opening 415 is a connector pin block 416 that includes one or more connector pins 416 a. The connector pins 416 a are designed and positioned such that they are correspondingly received within a wiring connector block 417 located within the recess 411 of the mounting plate 307. It should be understood that in other embodiments, the components may be reversed. For example, the connector pin block 416 may be located in the recess 411 of the mounting plate 307, while the wiring connector block 417 may be located within the opening 415 in the housing 301. As explained below, electrical wires connecting the wiring connection block 417 to the controlled system and the electrical source are connected on the back side of the wiring connector block 417. Unlike conventional designs, this configuration allows for quick and easy electrical connection to the housing 301 by way of the mounting plate 307 when the housing 301 and mounting plate 307 are coupled together. Additionally, as mentioned above, it should be understood that though the wiring connector block 417 is configured to provided electrical connection, in some embodiments, the electrical wiring block 417 may also serve as the latch that secures the housing 301 to the mounting plate 307. The frictional force of connectors pins 416 a coupled to the housing 301 when received within the wiring connector block 417 may be sufficient to securely hold the housing 301 to the mounting plate 307.

The mounting plate 307 also includes a flange 418 that forms an outer perimeter of the mounting plate 307. The flange 418 abuts the surface of the wall 309 when in a mounted position and covers the opening 311 (See FIG. 3). In this embodiment, the flange 418 may also include attachment openings 419 along upper and lower portions of the flange 418. These openings 419 are positioned to correspond to attachment openings in the standard electrical wiring box 310 located within the wall 309. (See FIG. 3). By way of example, a screw can be inserted through each of the openings 419 and used to attach the mounting plate 307 to an electrical wiring box, such as the one shown in FIG. 3.

FIGS. 5A and 5B illustrate front and back views of the advantageous slimmer profile that is present when the housing 301 is coupled to the mounting plate 307. Since a portion of the back panel 305 resides within the recess 411 of the mounting plate 307 and extends into the wall 309 (FIG. 3), the housing 301 may have a thinner profile than conventional designs. Moreover, a particular advantage of the embodiment described herein is that when the housing 301 is coupled to the mounting plate 307, vents 502 that are located about the edges of both the front and back panels 302, 305 of the housing 301 and are substantially unobstructed by the mounting plate 307. That is, the vents 502 located on the edges of at least the back panel 302 are not covered by the mounting plate 307. Thus, this configuration not only allows for improved cooling of the electrical components within the housing 301 when compared to conventional designs, it also provides a thinner profile when compared to those same conventional designs. Further, the sensor components, such as a temperature sensor, within the housing 301 remain closer to the monitored space even though the raised portion 410 (FIG. 4A) of the back panel 305 is contained within the wall.

FIG. 5B also illustrates electrical wire terminals 503 located on the back side of the wiring connector block 417 for inserting electrical wires therein and providing electrical connection to the electrical components within the housing 301.

FIG. 6 shows the back panel 305 of housing 301. The components previously mentioned are designated as before, however, this view also shows the printed wiring board 602 on which the previously mentioned electrical components 603 can be seen. The printed wiring board 602 and the electrical components 603 may be of conventional design and configured to provided control of the applicable system. In addition, certain embodiments of the housing 301 may further include one or more test probe openings 604 through which a test probe may be inserted to make contact with electrical contacts 605 located on the board 602. The purpose of these openings 604 are for easy testing of the electrical circuits once the housing 301 is assembled.

FIG. 7 shows a back view of the housing 301 coupled to the mounting plate 307. As seen in this view, portions of the electronic components 603 are visible through openings within the back panel 305 of the housing 301 and the mounting plate 307. The mounting plate 307 also includes one or more openings 702 that align with the openings 604 in the back panel 305 as shown in FIG. 6 when the mounting plate 307 is coupled to the housing 301. As used in this disclosure and in the claims, the holes 604, 702 are considered to be aligned as long as a test probe can be inserted through the respective opening 604 and 702 to make contact with the electrical contact 605. It should be understood that though 11 holes are shown, the disclosure is not limited to any specific number and will depend on the design being tested.

FIGS. 8A-8C illustrate another embodiment of a mounting plate 800 that can be coupled to the housing 301 of FIG. 3. This embodiment can be alternatively employed in those instances where an electrical wiring box is not present in the wall 801. This embodiment includes a flange 802, a electrical wiring block 803 and one or more latches 804, one or more test probe openings 805, one or more optional attachment openings 806 and a recess 807, similar to the previously described embodiment. In addition, however, this embodiment includes two or more oppositely disposed tabs 808 that are movably coupled to the mounting plate 800 at an inside edge 809 of the recess 807; that is, they are configured to move with respect to the mounting plate 800. Though the illustrated embodiment shows two tabs 808, it should be understood that other embodiments have include more or less than the illustrated number. FIG. 8B illustrates the mounting plate 800 positioned in an opening located in the wall 801 prior to the engagement of tabs 808, and FIG. 8C illustrates the mounting plate 800 after engagement of the tabs 808 against an inside face of the wall 801. In this particular embodiment, the tabs 808 may be made of a malleable material, such as thin sheet metal, that can easily be bent relative to the mounting plate 800 and against the inside face of the wall 801. The tabs 808 may either be integrally formed with the mounting plate 800, or they may be mechanically coupled to the mounting plate 800, which may be the case when the mounting plate 800 is comprised of a plastic or other composite material.

FIGS. 9A-9C illustrate another embodiment of a mounting plate 900 that can be coupled to the housing 301 for of FIG. 3. This embodiment can be alternatively employed in those instances where an electrical wiring box is not present in the wall 901. This embodiment includes a flange 902, a electrical wiring block 903 and one or more latches 904, one or more test probe openings 905, one or more optional attachment openings 906 and a recess 907, similar to the previously described embodiment. In addition, however, this embodiment includes two or more oppositely disposed tabs 908 that are movably coupled to the mounting plate 900 at an inside edge 909 of the recess 907; that is, in this embodiment, they are configured to rotate with respect to the mounting plate 900. Though the illustrated embodiment shows four tabs 908, it should be understood that other embodiments have include more or less than the illustrated number. The tabs 908 may be hinged to the mounting plate 900 in a manner that allow the tabs to rotate through elongated tab slots 908 a and into the edges of the opening in the wall 901. FIG. 9B illustrates a sectional view of the mounting plate 900 positioned in an opening located in the wall 901 prior to the engagement of tabs 908 taken along the line 9B-9B, and FIG. 9C illustrates a sectional view of the mounting plate 900 after engagement of the tabs 908. As seen the tabs 908 have cut into the wall material, thereby anchoring the mounting plate 900 onto the wall 901. In this particular embodiment, the tabs 908 may be made of a sturdy material, such as metal, that has a sharp edge that will allow it to rotate and cut into the material of which the wall 901 is comprised. The tabs 908 may be mechanically coupled to the mounting plate 900 with a pin and block 910 that allows the tabs 908 to rotate with respect to the mounting plate 900.

FIGS. 10A-10C illustrate another embodiment of a mounting plate 1000 that can be coupled to the housing 301 of FIG. 3. This embodiment can be alternatively employed in those instances where an electrical wiring box is not present in the wall 1001. This embodiment includes a flange 1002, a electrical wiring block 1003 and one or more latches (not shown), one or more test probe openings 1005, one or more optional attachment openings 1006 and a recess that causes a raised back portion 1007, similar to the previously described embodiments. In addition, however, this embodiment includes two or more oppositely disposed tabs 1008 that are movably coupled to the mounting plate 1000 on the face of the raised back portion 1007; that is, in this embodiment, they are configured to rotate with respect to the mounting plate 1000. Though the illustrated embodiment shows two tabs 1008, it should be understood that other embodiments have include more or less than the illustrated number. The tabs 1008 may be hinged to the mounting plate 1000 in a manner that allow the tabs 1008 to rotate outwardly from the mounting plate 1000 and frictionally engage the inside face of the wall 1001 to hold the mounting plate 1000 securely against the wall 1001. FIG. 10B illustrates a sectional view of the mounting plate 1000 positioned in an opening located in the wall 1001 prior to the engagement of tabs 1008 taken along the line 10B-10B, and FIG. 10C illustrates a sectional view of the mounting plate 1000 after engagement of the tabs 1008. As seen the tabs 1008 have been rotated such that they engage the inside face of the wall 1001, thereby anchoring the mounting plate 1000 onto the wall 1001. In this particular embodiment, the tabs 1008 may be made of a sturdy material, such as metal or hard plastic. The tabs 1008 may be mechanically coupled to the mounting plate 1000 with a pin and block 1010 that allows them to rotate with respect to the mounting plate 1000.

FIGS. 11A-11C illustrate another embodiment of a mounting plate 1100 that can be coupled to the housing 301 of FIG. 3. This embodiment can be alternatively employed in those instances where an electrical wiring box is not present in the wall 1101. This embodiment includes a flange 1102, a electrical wiring block 1103 and one or more latches 1104, one or more test probe openings 1105, one or more optional attachment openings 1106 and a recess 1107 that forms a raised portion 1107 a on the back side of the mounting plate 1100, similar to the previously described embodiment. In addition, however, this embodiment includes two or more oppositely disposed tabs 1108 that are movably coupled to the mounting plate 1100 on the back side of the mounting plate 1100; that is, in this embodiment, they are configured to slidably move within a track 1108 a that is coupled to the mounting plate 1100 and relative to the mounting plate 1100. Though the illustrated embodiment shows four tabs 1108, other embodiments may include more or less than this number. FIG. 11B illustrates the mounting plate 1100 positioned in an opening located in the wall 1101 prior to the engagement of tabs 1108, and FIG. 11C illustrates the mounting plate 1100 after engagement of the tabs 1108 against an inside face of the wall 1101. As seen, the tabs 1008 have been slid within the tracks 1008 a such that they engage the inside face of the wall 1101, thereby anchoring the mounting plate 1100 onto the wall 1101. In this particular embodiment, the tabs 1108 may be made of a sturdy material, such as metal or hard plastic. The tracks 1108 a may either be integrally formed with the mounting plate 1100, or they may be mechanically coupled to the mounting plate 110, which may be the case when the mounting plate 1100 is comprised of a plastic or other composite material. The tabs 1108 are slidably captured within the tracks 1108 a.

FIGS. 12A-12C illustrate another embodiment of a mounting plate 1200 that can be coupled to the housing 301 of FIG. 3. This embodiment can be alternatively employed in those instances where an electrical wiring box is not present in the wall 1201. This embodiment includes a flange 1202, a electrical wiring block 1203 and one or more latches (not shown), one or more test probe openings 1205, one or more optional attachment openings 1206 and a recess that results in a raised back portion 1207, similar to the previously described embodiments. In addition, however, this embodiment includes two or more oppositely disposed tabs 1208 that are movably coupled to the mounting plate 1200 at the raised back portion 1207; that is, in this embodiment, they are configured to receive a screw 1209 therethrough that when the screw 1209 is turned in the appropriate direction, the tabs 1208 are pulled against an abutting wall 1201. Though the illustrated embodiment shows two tabs 1208, it should be understood that other embodiments may include more or less than the illustrated number. The tabs 1208 can be positioned such that they extend in a lateral direction and behind the wall 1201, as shown, such that they can be pulled or tightened against the inside of the wall 1201 when the screw 1209 is turned in the appropriate direction and engage the inside face of the wall 1201 to hold the mounting plate 1200 securely against the wall 1201. FIG. 12B illustrates a sectional view of the mounting plate 1200 positioned in an opening located in the wall 1201 prior to the engagement of tabs 1208, and FIG. 12C illustrates a sectional view of the mounting plate 1200 after engagement of the tabs 1208. As seen the screws 1209 have been rotated to secure the tabs 1208 against the inside face of the wall 1201, thereby anchoring the mounting plate 1200 to the wall 1201. In this particular embodiment, the tabs 1208 may be made of a sturdy material, such as metal or hard plastic. The tabs 1208 may be mechanically coupled to the mounting plate 1200 by way of the screw 1209.

Those skilled in the art to which this application relates will appreciate that other and further additions, deletions, substitutions and modifications may be made to the described embodiments. 

What is claimed is:
 1. A heating ventilation air conditioning (HVAC) thermostat controller, comprising: a mounting plate having front and back sides, said front side being defined by a recess having a geometric shape and formed therein and a wall covering flange extending around a perimeter of said recess and further comprising an electrical block pin connector located and fixed within said recess and extending outwardly from said front side of said recess, said back side being defined by a raised surface geometrically corresponding to said geometric shape of said recess; and a controller housing having a front panel having an outer edge oriented toward a rear of said controller housing and with vents located therein and that includes a display screen, and a back panel coupled to said front panel and having and outer edge, oriented toward a front of said controller housing and with vents located therein, wherein said outer edges of said front panel and said back panel oppose each other when said front panel and said back panel are coupled together and wherein an exterior surface of said back panel has a raised surface that has a geometric shape that corresponds to a geometric shape of said recess and is configured to be received within said recess of said mounting plate, such that said vents of said outer edges of said front and back panels are uncovered when said back panel is received with said recess of said mounting plate, said back panel further including an electrical block pin connector affixed thereto and configured to cooperatively engage said electrical block pin connector of said separate mounting plate to provide an electrical connection between said mounting plate and said controller housing.
 2. The HVAC controller recited in claim 1, wherein said raised surface of said back side of said controller includes one or more latch openings located in said raised surface of said back side and said mounting plate comprises one or more latches located in said recess configured to be received and latachably engaged in said one or more latch openings.
 3. The HVAC controller recited in claim 1, further including movable tabs coupled at said back side of said mounting plate and comprised of a malleable material that allows said tabs to be bent against an inside face of said wall and secure said mounting plate to said wall.
 4. The HVAC controller recited in claim 1, further including movable tabs rotatably coupled to said mounting plate and said mounting plate further includes elongated slots located on opposing sides of an inside edge of said recess and wherein said tabs are coupled to said mounting plate with a pin and are configured to rotate through said elongated slots and into an edge of said opening in said wall.
 5. The HVAC controller recited in claim 1, further including movable tabs rotatably coupled to said back side of said mounting plate by a pin and configured to rotate in opposing directions and against an inside face of said wall.
 6. The HVAC controller recited in claim 1, further including movable tabs wherein said movable tabs are opposing slidable plates located on said back side of said mounting plate and each slidably captured within a track, said movable tabs configured to slide within said track and against an inside face of said wall.
 7. The HVAC controller recited in claim 1, further including movable tabs, wherein said movable tabs are threadably couplable to said back side of said mounting plate with a screw and configured to exert a securing force against an inside face of said wall when said screw is rotated with respect to said mounting plate.
 8. The HVAC controller recited in claim 1, wherein said wall covering flange of said mounting plate includes mounting openings therein.
 9. The HVAC controller recited in claim 8, wherein said mounting openings are positioned about said wall covering flange such that said mounting plate are attachable to an electrical connection box.
 10. The HVAC controller recited in claim 1, wherein a perimeter of said raised portion on said back panel is smaller than a perimeter of said back panel.
 11. The HVAC controller recited in claim 1 wherein said electronic components are located on a printed wiring board (PWB) within said housing.
 12. The HVAC controller recited in claim 1, said front panel includes a screen opening and wherein said electronic components includes a touch screen control panel exposed by said screen panel opening.
 13. The HVAC controller recited in claim 1 wherein said back panel has a plurality of testing probe holes that align with a testing contact pad of said electrical components within said controller housing to allow a testing probe to be inserted through at least one of said plurality of testing probe holes to test said electrical components. 